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AOS TFTs for AMOLED TV

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Handbook of Visual Display Technology

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Abstract

Since the introduction of televisions based on active-matrix organic light-emitting diode (AMOLED) technology, the major technical issues that have been addressed by the panel makers involve the fabrication of high-performance thin-film transistors (TFTs) and the selection of OLED materials, along with their color management (individual RGB patterns vs. single white OLED with color filters). In the present review, a brief summary on the history and research motivation of AMOLED flat panel displays is provided first. In the ensuing section, the issues related to amorphous oxide semiconductor (AOS) TFTs are examined. While a small range of high-end products incorporating AOS TFT backplanes is already commercially available, some technical issues still need to be resolved in order to have AOS TFTs implemented in AMOLED panels routinely, under well-controlled processes. In this regard, an overview is provided concerning the effect of TFT architecture, AOS materials, gate insulator/passivation layers, and gate/contact metals on the device performance and stability. The achievement of high spatial uniformity is also important for large-area panels, which has led to the development of pixel compensation circuitry. The third section describes the current status of panel manufacturers and equipment suppliers. At present, only two major companies (LG and Samsung) are launching AMOLED TVs in the market, and only a few equipment suppliers provide the necessary AOS-oriented deposition systems (sputter, plasma-enhanced chemical vapor deposition) and annealing furnaces. Finally, the prospects of AMOLED TVs based on AOS TFTs are discussed. The successful implementation of AOS TFTs is vital regarding the mass production of high-resolution AMOLED TVs at relatively low costs, which is anticipated to boost up the growth of the AMOLED flat panel display industry.

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Authors and Affiliations

  1. Division of Materials Science and Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, 133-791, Seoul, Republic of Korea

    Jin-Seong Park

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  1. Jin-Seong Park
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Correspondence to Jin-Seong Park .

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Editors and Affiliations

  1. Industrial Technology Research Institute Display Technology Center, Hsin Chu, Taiwan

    Janglin Chen

  2. Nottingham Trent University School of Computing & Informatics, Nottingham, United Kingdom

    Wayne Cranton

  3. Veritas et Visus, Temple, TX, USA

    Mark Fihn

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© 2015 Springer-Verlag Berlin Heidelberg

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Park, JS. (2015). AOS TFTs for AMOLED TV. In: Chen, J., Cranton, W., Fihn, M. (eds) Handbook of Visual Display Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35947-7_178-1

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  • DOI: https://doi.org/10.1007/978-3-642-35947-7_178-1

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Online ISBN: 978-3-642-35947-7

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